Bighorn Sheep in Colorado in September
Yes, September is a good month to see bighorn sheep in Colorado. It is the 5th busiest month of the year, with 385 of the 4,311 sightings logged across the year (8.9%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for bighorn sheep in Colorado
8.9%
of yearly sightings
385
records in September
#5
busiest month of 12
4,311
verified records a year
August 13.2%, September 8.9%, October 7.2%. Busiest month is July at 16.2%.
4,311 verified observations of bighorn sheep in Colorado, recorded across 12 months of the year on iNaturalist.
When bighorn sheep are recorded in Colorado
Peak month
July
699 records (16.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 129 | 3% |
| February | 151 | 3.5% |
| March | 263 | 6.1% |
| April | 375 | 8.7% |
| May | 425 | 9.9% |
| Junepeak | 607 | 14.1% |
| Julypeak | 699 | 16.2% |
| Augustpeak | 571 | 13.2% |
| September | 385 | 8.9% |
| October | 311 | 7.2% |
| November | 241 | 5.6% |
| December | 154 | 3.6% |
Bighorn Sheep you are most likely to see
| Species | Verified observations |
|---|---|
| Bighorn Sheep | 4,311 |
In Colorado, September carries 8.9% of the year's bighorn sheep sightings, about 0.6 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (13.2%) into September, and it heads toward October (7.2%) after. The busiest month is July (16.2%), so if timing is flexible, that window is the safer bet.
The bighorn sheep most often recorded in Colorado are Bighorn Sheep. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which bighorn sheep you are most likely to see
- Bighorn Sheep4,311 records
Plan your bighorn sheep trip in Colorado
Start with live tours near Bent's Old Fort National Historic Site, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Use the live GetYourGuide widget to compare local departures and activity styles close to the main bighorn sheep viewing area.
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Frequently asked questions
Can you see bighorn sheep in Colorado in September?+
Yes. September accounts for 385 of the 4,311 verified bighorn sheep sightings logged in Colorado across the year, which is 8.9% of the annual total.
Is September a good time to see bighorn sheep in Colorado?+
September is the 5th busiest month. It is workable, though July and June is the stronger window for a reliable sighting.
What month is best for bighorn sheep in Colorado?+
July is the single busiest month, with the broader peak running through July, June and August, based on 4,311 verified observations.
Which bighorn sheep are you most likely to see in Colorado?+
The most-recorded species in Colorado are Bighorn Sheep, based on all-time iNaturalist counts.
See bighorn sheep in Colorado in other months
More wildlife in Colorado